Fibre Tip Sensor with Embedded FBG-LPG for Temperature and Refractive Index Determination by means of the Simple Measurement of the FBG Characteristics

Figure 5

Thermal response of the hybrid sensor: (a) dependence of the FBG’s wavelength shift on temperature; (b) relationship between Bragg reflected power and temperature; (c) relationship between Bragg reflected power and Bragg’s resonance, temperature-induced, wavelength shift.

(a)

(b)

(c)